Now water cooled. Lowered the seat a bit. Drilled the frame for wiring and cables. Welded up the remaining braces for the engine mount. Made a front axle spacer and trimmed back the brake-hub stop on the YZ80 forks to work with the AT1 brake hub. Frame and tank are from a '78 JC Penney Swinger 2. Engine's off a '81 Honda Hobbit. Fresh rebuild with aluminum stuffed race crank, 70cc DR cylinder and piston, Malossi H2O head. Breathes through a TrickMETRIC adapter, aftermarket reeds and Dio intake. The carb is Tillotson HL324 (about 21mm venturi, I think). Ignition is an HPI Inner Rotor CDI. Exhaust is Proma with a Polini baffle. Added a TJT variator, Malossi clutch springs, a stiffer spring for the NOS rear variator. Lightened the clutch bell a little bit, too. A custom swingarm allows for the fat rear wheel. Front and back tires ride on shouldered 16" aluminum rims with stainless spokes. New engine-mount pivot tube with bronze bushings to take some of the slop out of the suspension--also replaced rubber mounts with bearings.